Walking on the track edge and cutting switchbacks increase damage, cause erosion, and visual scarring.
Walk single file to avoid widening the trail.
Avoid sensitive habitats, wetlands, streams, meadows, cryptobiotic soils of the desert, and tundra. Watch where you put your feet.
Be especially cautious around horses and bikes. Stay to the right of the trail and let them pass.
Flagging and marking trails in unsightly. If flagging is necessary, remove it as you leave.

EQUESTRIANS

Stay on designated roads, trails, and other areas open to horse use.
Be considerate of others on the road or trail.
Avoid spooking livestock and wildlife you encounter.
When riding, be especially cautious around hikers and bikers.
Ride single file to reduce trail damage, and don’t cut switchbacks.
Water animals in areas where stream banks and water access can withstand hard use and are downstream from campsites.

The previous information and more can be found on any of the following sites: